John w



(No Model.)

J. W. GWYNN.

LANTERN FOR ELECTRIC ARG LIGHTS. No. 427,986. Patented May 13.1890.

v Jizzf/W Gwyn/7@ @ff/JW` @www f UNITED STATES PATENTV OFFICE.

JOI-IN IV. GVYNN, OF BUOYRUS, OHIO, ASSIGNOR OF FOUR-FIFTHS TO J. B.GORMLEY, ROBERT MAUDSLEY, MARY BLANOH LEMERT, AND KATE E.

LEMERT, ALL OF SAME PLACE.

LANTERN FOR ELECTRIC-ARC LIGHTS.

SPECIFICATION forming part 0f Letters Patent NO. 427,986, dated May 13,1890,

Application filed September 24, 1889. Serial llo. 324,894. (No model.)

The common globes now used as the lanterns for shielding and modifyingthe electric lights are liable to break, owing to the unequal expansionof the material, caused by the heat of the light, the currents of air,and other causes.

In my invention has been devised a construction which permits suchexpansion of and resultant contraction and prevents the glass from beingbroken from these causes, and at the same time the means for holding theplates of the lantern together and securing the lantern to thelight-frame are simple in construction and durable for the purposesintended. l

Another object of my invention is to so constructthemechanism holdingthe lantern that it is specially applicable to hold the plates of thelantern by the upper ends, so that there will be no part ot the framebelow the light to throw shadows or otherwise detract from theefficiency of the light.

I have illustrated my invention bythe accompanying drawings, wherein.-

Figure l is a side view in elevation of an electric-arc-light Aframehaving my improved lantern applied thereto. Fig. 2 is a perspective ofthe lantern removed from the lamp. Fig. 3 is a perspective of thelantern-frame removed from the lantern. Fig. 4 is a detail view of oneof the clamps on alarger scale than shown in the other figures. Fig. 5is a modiied form of clamp intended to take over the ends of the platesof the lantern.

A designates the electric-arc lamp arranged in the ordinary frame,having vertical side held together with the function suspension bars l 2to sustain the bridge which supports the lower carbon. Either or both ofthese bars may be utilized as means to which to connect the frame ot' myimproved lantern. Y

B designates an angular metallic frame, shown rectangular inconformation and provided on one of its bars with a clamp 3, by which itcan be secured to the rod of the lightframe, as shown, or to such othersupport as may be desired or convenient. On each bar of the frame arevertically-arranged clamping projections 4, which are slightly curved invertical direction, so that their ends bear on the 'plates forming thelantern. At the ends of the clamping projections are secured 'pieces ofinsulating' material 5, so that the frame may be suspended with aslittle liability to disturb the current as possible and a slight elasticfunction imparted to the clamping means. Through the bars at the middleof the clamps are small bolt-holes, through which the fasteningbolts 6are projected and passed through holes in the plates of the lantern. Onthe ends of the bolts 6 are rubber nuts 7 which hold the bolts clampedto the lantern. If it be desired, the clamping means 3,whieh support thelantern and frame to the rods of an electric light may be duplicated, inwhich case one of the supports should be insulated to prevent an inducedcross-current.

C designates the lantern, composed of glass plates arrangedsubstantially as shown and clamped at the upper ends by the frame andclamps. I have shown the lantern as consisting of four plates of glass;but any number of plates of glass may be used and the shape of theangular inelosing-frame made to conform to the angles made by theplates. .In Fig. 5 of the drawingsI have shown the frame having clampshooked to take in the ends ot' the plates and the set or clamping screwlet throughthem, as shown.

It will be perceived that by the arrangement of the plates of thelantern they are of independent expansion and contraction without dangerto the other plates forming the inelosure, and

that should one plate become broken the others may remain whole and thelantern be repaired by the substitution of a new plate.

llavingthus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

l. The lantern for an electric-arc light herein described, consisting ofglass plates arranged at angles to inclose the light, anda holding-frameclamped to the upper ends of the plates and provided with means forattaching the lantern to a support, substantially as described, and :forthe purpose specified.

2. The lantern foran electric-arclightherein described, consisting of anangular metallic frame l5, formed with verticallyarranged clampingprojections l, provided with clamping-bolts adapted to clamp and holdthe plates of the lantern, and glass plates arranged in the frame andclamped together at their upper ends, substantially as described, andfor the purpose specified.

3. In a lantern for an electric-arc light, the combination of an angularmetallic traine B, formed with clamping' projections 4, curved invertical direction and provided with insulated linings, bolts projectedthrough the frame and lantern-plates, lantern-plates arranged in theframe, and rubber nuts on the bolts, substantially as described, and forthe purpose Specified.

4. In a lantern for an electric-arc light, the combination of an angularmetallic frame formed with clamping proj cctionshaving rubber linings,clamping-bolts through the clamping' projections, and lantern-platesarranged in the frame and held at their upper ends independently of eachother by the clamps of the metallic f rame, substantially as described.

In witness whereof I hereunto set my hand in the presence of twoattesting witnesses.

JOHN W. GWYNN.

Attest:

FREDERioK E. FREY, O. C. BARTH.

